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Novel yellow color-emitting BaY2O4:Dy3+ phosphors: persistent luminescence from blue to red

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Abstract

BaY2O4:Dy3+ phosphors were synthesized using the solid-state method. X-ray diffraction, photoluminescence, persistent luminescence, and thermoluminescence spectra were employed to characterize the phosphors. The powder X-ray diffraction pattern confirms its orthorhombic structure. Photoluminescence emission and excitation spectra were investigated as a function of Dy3+ ion concentration. The photoluminescence excitation spectra revealed that the Dy3+ excitation band has a main excitation center located at 351 nm. The photoluminescence spectra exhibit an intense yellow emission due to a strong 4F9/2 → 6H13/2 transition at 578 nm, a weak 4F9/2 → 6H15/2 transition at 488 nm, and a feeble 4F9/2 → 6H11/2 transition at 670 nm. According to the characteristic emission (4F9/2 → 6H13/2), the concentration of Dy3+ ions was optimized to 1 mol%. The trap depths were examined by the thermoluminescence glow curves. In addition, in the process of exploring the persistent luminescence and thermoluminescence mechanism of BaY2O4:Dy3+ phosphors, doped Dy3+ was found to form defects and act as charge carrier traps, resulting in persistent luminescence.

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Acknowledgements

The authors acknowledge the financial support from the National Natural Science Foundation of China (no. 51972065).

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Authors and Affiliations

  1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006, China

    Tiansong Dai, Guifang Ju, Yahong Jin, Xinquan Zhou, Yang Li, Haoyi Wu, Zhengfa Hu & Yihua Hu

  2. Synergy Innovation Institute for Modern Industries of GDUT and Dongyuan, Heyuan, 517025, China

    Zhengfa Hu & Yihua Hu

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  1. Tiansong Dai
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  2. Guifang Ju
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  3. Yahong Jin
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  4. Xinquan Zhou
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  5. Yang Li
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  7. Zhengfa Hu
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  8. Yihua Hu
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Correspondence to Guifang Ju or Yihua Hu.

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Dai, T., Ju, G., Jin, Y. et al. Novel yellow color-emitting BaY2O4:Dy3+ phosphors: persistent luminescence from blue to red. Appl. Phys. A 126, 217 (2020). https://doi.org/10.1007/s00339-020-3393-z

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  • DOI: https://doi.org/10.1007/s00339-020-3393-z

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